Wikisource is a Wikimedia project to build a library of free texts. Initially called "Project Sourceberg" when it began in 2003 (a play on the already existing non-Wikimedia project with similar goals, Project Gutenberg), it branched into subdivisions for individual languages by 2005. Now Wikisource libraries house books, novels, essays, historical documents, poems, letters, speeches and other documents, so long as they can be made available under the CC-BY-SA open content license.